Method of making furrow opener boots



June 16, 1942.

Y e, M. KRIE GBAUM METHOD OF MAKING FURROW OPENER BOOTS Filed Jan. 1:5, 1940 2 s sheet 1 [1v VENTOR 030205 MKRIEGBAUM .BY ATT).

June 16,- 1942. e. M. KRIEGBAUM METHOD OF MAKING FURROW UPENER BOOTS Filed.Jan. 15, 1940 2 Sheets-Sheet 2 INVENTOR GEORGE MIflQIEGBAI/M B Y ATTY.

Patented June 16, 1942 he I 2,286,285

METHOD OF MAKING FURROW OPENER BOOTS George M. Kriegbaum, Richmond, Ind., assignor to International HarvesterCompany, a corporation of New Jersey Application January 13, 1940, Serial No. 313,733

3 Claims.

This invention relates to a method of making a furrow opener boot. More specifically it relates to a method of making a boot which is formed of cast metal and has embedded therein two lubricating tubes for two furrow opening members adapted to be carried by the boot.

The patent to Paluck, 2,091,486, August 31, 1937, shows a furrow opener boot provided with two separate lubricating tubes for two disk furrow opener bearings. There is a problem of manufacturing furrow opener boots of this type.

An object of the present invention is to provide an improved method for making a furrow opener boot.

Another object is the provision of a method for making a furrow opener boot formed of cast metal in which is embedded a pair of lubricating tubes.

A further object is to provide a method for making an article formed of cast metal in which is embedded a tube.

According to the present invention one end of each of a pair of tubes is pinched shut. The tubes are soldered or welded together and then placed in position in the mold. Metal is cast in the mold in the form of a furrow opener boot and covers the tubes and their closed ends. Then, the casting is removed from the mold, and a pair of opening are drilled therein. The drilling of these openings not only provides spaces for parts intended to secure disk furrow openers to the castings, but also opens up the closed ends of the tubes and thereby places the tubes in communication with the aforementioned openings.

In the drawings:

Figure 1 is a side elevation of a furrow opener boot formed by the method of the present invention;

' Figure 2 is a section taken along the line 2-2 of Figure 1;

Figure 3 is a View of a tube;

Figure 4 is a view of the same tube with one end bent;

Figure 5 is a view of the tube with the bent end pinched shut;

Figure 6 is a view of two tubes like the one in Figure 5 soldered together;

Figure '7 is another view of these two tubes;

Figure 8 is a sectional view through a mold showing these two tubes positioned within the molds; and,

Figure 9 is a sectional view similar to the view of Figure 2 but showing the cast furrow opener boot before certain final operations have been performed.

The furrow opener boot formed according to the method of the present invention is designated by the reference numeral 10. It is somewhat similar to the boot of the aforementioned Paluck patent. The boot [0 comprises a hopper H which has an inlet for seed and an extension 12. The boot is to be secured on a drag bar, not shown.

III-'FigUI'B'2iS shown a pair of similar lubricating tubes l3 embedded in the boot, the upper' end of the tubes extendinginto respective openings M which have outlets through lubricating nipples l5. The lower ends N5 of the tube extend generally at right angles to the rest of the tubes and in opposite directions from one another into threaded openings I! formed in the furrow opener boot. These openings I! serve to secure members to the boot by which disk furrow openers are attached to the boot, as more fully shown in the Paluck patent. These members form no part of the present invention and so are not shown.

The tubes I 3 are formed from straight sections of tubing as shown in Figure 3 one end portion 16 being bent approximately at right angles to the remainder of the tube and the other end I8 is bent slightly as shown in Figure 4. As shown in Figure 5, the end of the tube [6 is pinched shut as at [9. Figures 6 and 7 show two of these tubes secured together as by soldering or brazing 20 at a point adjacent the end I6.

Figure 8 shows the tubes positioned Within a mold 2| which has portions 22 and 23 extending into contact with the tubes so as to support them. A core member 24 is also placed within the mold and has spherical projections 25 which cover the open ends of the tubes l3. Molten metal is poured through an opening 26 in the mold. 2|, and a furrow opener boot like that shown in Figure 1 is formed. When the boot is removed from the mold, the section taken along the line 22 is as shown in Figure 9. The tubes l3 are covered by the cast metal except at their upper ends, which extend into the openings l4 and at an intermediate point 21 which was contacted by the parts 22 and 23 of the mold. The ends l6, pinched as at I9, are completely covered. Openings I! are drilled in the boot as shown in Figure 2, and the operation which forms each opening also removes the pinched portion of the tube and thereby opens up each tube to the opening. The opening I! may be threaded in a separate operation. The boot is also machined as at 28 to provide a smooth bearing surface for parts as shown in the Paluck patent.

It will be apparent from the foregoing description that a new and novel method of forming a furrow opener boot has been provided. The method involves a forming operation by which not only an opening is drilled, but also the closed end of the lubricating tube is removed. It is the intention to limit the invention only within the scope of the appended claims.

What is claimed is:

1. The method of making a furrow boot having two separate lubricant passageways for two openings, comprising bending two tubular members at a point adjacent one end so as to provide each member with an end portion extending transversely to the main portion, closing the end portion ofeach tubular member, juxtaposing the members so that the end portions extend away from one another and the main portions extend in side-by-side relationship, placing the members in a mold and holding them in fixed relationship with respect thereto, casting metal around the tubular members and over the closed ends; and cutting through the cast metal and the closed ends to form openings into which the said end portions of the tubular members extend, the tubular members forming separate passageways for lubricant into the said openings.

2. The method of making a furrow boot having two separate lubricant pasageways for two openings, comprising bending two tubular members at a point adjacent one end so as to provide each member with an end portion extending transversely to the main portion, pinching shut the said end portion of each tubular member, securing the two members together at a point adjacent the end portions so that the end portions extend away from one another and the main portions extend in side-by-side relationship, casting metal around the tubular members and over the pinched ends, and cutting through the cast metal and the pinched ends to form openings into which the said end portions of the tubular members extend, the tubular members forming separate passageways for lubricant into the said openings.

3. The method of making a furrow boot having two separate lubricant passageways for two openings, comprising bending two tubular members at a point adjacent one end so as to provide each member with an end portion extending transversely to the main portion, pinching shut the said end portion of each tubular member, securing the two members together at a point adjacent the end portions so that the end portions extend away from one another and the main portions extend in side-by-side relationship, supporting the tubular members adjacent their points of securement, covering the ends of the tubular members opposite the pinched ends, casting metal around the tubular members and over the pinched ends, and cutting through the cast metal and the pinched ends to form openings into which the said end portions of the tubular members extend, the tubular members forming separate passageways for lubricant into the said openings.

GEORGE M. KRIEGBAUM. 

